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A processing method for precision large-size rigid pipe components

A processing technology and large-size technology, applied in the field of precision large-size rigid tube component processing technology, can solve problems such as poor manufacturability, large size, unqualified component shape and position accuracy, etc., to achieve reasonable process routes and reduce processing costs , The effect of solving processing problems

Active Publication Date: 2018-11-02
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the pipe assembly adopts a welded structure, the size is large, the wall is thin, and the inner hole at one end requires carburizing, so the manufacturability is very poor
The shape and position accuracy of components processed by conventional processes are unqualified, and they have been delivered out of tolerance

Method used

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  • A processing method for precision large-size rigid pipe components
  • A processing method for precision large-size rigid pipe components
  • A processing method for precision large-size rigid pipe components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a processing method for a precision large-size rigid pipe assembly, which is characterized in that: in the processing method for a precision large-size rigid pipe assembly, the large-end joint leaves a combined machining allowance and performs finishing on the assembly; In order to avoid the problem of out-of-axis joint outer circles at both ends caused by welding deformation, the positioning datums 1, 2 and 4 used on the horizontal jig boring machine are processed at one time on the ordinary lathe after welding, see figure 1 , eliminate the positioning and clamping deformation on the horizontal jig boring machine; then bore the inner holes at both ends on the horizontal jig boring machine, that is, align the small end carburizing inner hole 3, bore the big end big inner hole 5, and the big end outer end face 7 and the small end face 8, as the finishing benchmark of the follow-up process;

[0045] The processing route is:

[0046] Pipe material...

Embodiment 2

[0076] This embodiment provides a processing method for a precision large-size rigid pipe assembly, which is characterized in that: in the processing method for a precision large-size rigid pipe assembly, the large-end joint leaves a combined machining allowance and performs finishing on the assembly; In order to avoid the problem of out-of-axis joint outer circles at both ends caused by welding deformation, the positioning datums 1, 2 and 4 used on the horizontal jig boring machine are processed at one time on the ordinary lathe after welding, see figure 1 , eliminate the positioning and clamping deformation on the horizontal jig boring machine; then bore the inner holes at both ends on the horizontal jig boring machine, that is, align the small end carburizing inner hole 3, bore the big end big inner hole 5, and the big end outer end face 7 and the small end face 8, as the finishing benchmark of the follow-up process;

[0077] The processing route is:

[0078] Pipe material...

Embodiment 3

[0108] This embodiment provides a processing method for a precision large-size rigid pipe assembly, which is characterized in that: in the processing method for a precision large-size rigid pipe assembly, the large-end joint leaves a combined machining allowance and performs finishing on the assembly; In order to avoid the problem of out-of-axis joint outer circles at both ends caused by welding deformation, the positioning datums 1, 2 and 4 used on the horizontal jig boring machine are processed at one time on the ordinary lathe after welding, see figure 1 , eliminate the positioning and clamping deformation on the horizontal jig boring machine; then bore the inner holes at both ends on the horizontal jig boring machine, that is, align the small end carburizing inner hole 3, bore the big end big inner hole 5, and the big end outer end face 7 and the small end face 8, as the finishing benchmark of the follow-up process;

[0109] The processing route is:

[0110] Pipe material...

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Abstract

Provided is a processing technology method of a precise large-size rigid pipe assembly. The processing technology method comprises following steps: pipe material examination; part preparations; attachment cleaning; polishing of positions to be welded; flaring and necking; assembly and positioned welding; electron beam welding; overlap grinding; X-ray examination; repair welding; stress-relief heat treatment; marking; turning references at two ends; polishing and edge sharpening; turning a big-end inner cavity; polishing and edge shaping; bore grinding; four bore drilling; polishing and edge shaping; cleaning; magnetic crack detection; cleaning; final examination and oil seal. The processing technology method of the precise large-size rigid pipe assembly has following advantages: the processing technology method is reasonable in process route and suitable for precision processing of carburizing bores; processing difficulty of the precise large-size rigid pipe assembly is solved; the processing requirement is satisfied; and processing cost is decreased.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a processing method for precision large-size rigid pipe components. Background technique [0002] The precision large-size rigid pipe assembly has a special structure. It is welded by a rough pipe with a wall thickness of 1mm and two machined parts. The total length of the assembly is 463mm, and the diameter of the pipe is φ57mm. Components require high dimensional accuracy, shape and position accuracy. For example, the coaxiality of the inner hole and outer circle of the small end relative to the outer circle of the big end is not greater than φ0.08mm, and the runout of the inner hole of the big end relative to the outer circle of the big end is not greater than 0.02 mm, the surface roughness Ra of the small end carburized inner hole is not greater than 0.1 μm. Since the pipe assembly adopts a welded structure, the size is large, the wall is thin, and the inner hole at one ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
Inventor 王聪梅田海文魏鉴梅郑琪然高元军
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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